diff --git a/codes/kelvingoo/21401510.java b/codes/kelvingoo/21401510.java
new file mode 100644
index 0000000000000000000000000000000000000000..cdfcd90f87a2f3deb068fce70ffd75e43e6095c7
--- /dev/null
+++ b/codes/kelvingoo/21401510.java
@@ -0,0 +1,20 @@
+/**
+ * 冒泡排序函数
+ * aa bb cc
+ * @param a 待排序的数组
+ * @param n 待排序的数组长度
+ */
+public static void bubbleSort(int [] a, int n){
+    // 你的代码，使无序数组 a 变得有序
+    int temp;
+    for (int i = 0; i < a.length; i++) {
+        for (int j = 0; j < a.length - 1; j++) {
+            if (a[i] < a[j]) {
+                temp = a[i];
+                a[i] = a[j];
+                a[j] = temp;
+            }
+        }
+    }	
+
+} //end